When Stress Levels Get Too High.

Too much stress can negatively affect the immune system, cardiovascular system, neuroendocrine system, and central nervous system. Untreated chronic (long-term) stress can lead to muscle pain, insomnia, hypertension (high blood pressure), a weaker immune system and anxiety, which can lead to dozens of illnesses, including heart disease, depression, and obesity.

American Psychological Assoc, February 2013